diff --git a/json-spec.cabal b/json-spec.cabal
--- a/json-spec.cabal
+++ b/json-spec.cabal
@@ -1,6 +1,6 @@
 cabal-version:       3.0
 name:                json-spec
-version:             0.2.1.0
+version:             0.2.1.1
 synopsis:            Type-level JSON specification
 maintainer:          rick@owensmurray.com
 description:         = Motivation
@@ -116,7 +116,7 @@
 
 common dependencies
   build-depends:
-    , aeson      >= 2.2.0.0  && < 2.3
+    , aeson      >= 2.1.0.0  && < 2.3
     , base       >= 4.17.1.0 && < 4.18
     , containers >= 0.6.7    && < 0.7
     , scientific >= 0.3.7.0  && < 0.4